I have similar mileage @28k and just had the crystallization problem. I also had a problem with what appeared to be an oil leak and was the inlet hose to the inter-cooler being loose and ballooned. Also had an electronic component replaced because the HD radio did not work correctly, it wasn't the radio but another computer somewhere was not doing its job. Everything covered under warranty as expected. The motor/turbo setup so far appears bullet proof. My average mileage is 30.9 mpg for the last 7.5k miles. ( I bought it with 21.5K on the odometer)